JPH10237896A - Automatic greasing device of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply different amounts of grease to an operating device and a revolving device by setting the timing at which the grease is supplied to greased parts according to operating conditions. SOLUTION: Grease discharged from a grease pump 11 is supplied to a greased part 9A on the revolving wheel 3A side and to greased parts 9B-9N on the operating device side as it is switched by a second switching valve 20. The switching valve 20 is controlled by a controller 21 in such a way that a time interval during which a switched position (a) is selected is set to be longer than a time interval during which a switched position (b) is selected. Therefore, the amount of grease supplied to the revolving wheel 3A side can be reduced while the amount of grease supplied to the operating device side can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic lubrication device for a construction machine, for example, which automatically lubricates each greasing portion of the construction machine.

[0002]

2. Description of the Related Art In general, in a construction machine such as a hydraulic excavator, a plurality of bearing devices are provided in a working device such as a front, and these bearing devices are provided with lubricating parts requiring lubrication of lubricating oil. It has become. Then, it is necessary to supply lubricating oil to these lubricating parts every predetermined time in order to prevent the oil film from running out. For this reason, an automatic greasing device is attached to the construction machine.

[0003] Here, as an automatic lubricating apparatus according to the prior art, lubricating oil supplying means for supplying grease discharged from a pump means to a lubricating portion such as a turning device or each bearing device,
It is known to measure the time since the engine switch is closed, and to drive the pump means when the accumulated time reaches a predetermined time, for example, 30 minutes.

[0004] The lubricating oil supply means includes a parent distribution valve for distributing grease discharged from the pump means, and a child distribution valve for distributing and supplying grease distributed from the parent distribution valve to each greasing portion. The grease supplied to each greasing portion is adjusted by the connection method of these distribution valves.

[0005] In such an automatic greasing device, grease is automatically supplied to a greasing portion such as a turning device or each bearing device at predetermined time intervals, and abnormal wear of the turning device or each bearing device is reduced. Seizure is prevented.

[0006]

In the above-described automatic greasing apparatus according to the prior art, the greasing is automatically performed after a set time has elapsed. It is carried out. Further, the set time is set in accordance with a grease supply site requiring the largest amount of grease supply.

Further, in the construction machine, the amount of grease required at each greasing portion differs depending on the working state of the working device. Therefore, the timing is set by measuring the time as in the automatic greasing device described above. In such a case, the grease is greased even in a portion where the grease previously greased is not consumed. For this reason, there is a problem that there is a portion in which grease is unnecessarily supplied and the running cost is increased.

Further, in the case where a distribution valve is used as the lubricating oil supply means and the amount of greasing at each greasing portion is changed, the setting of the greasing amount at each greasing portion is set at the time of shipment. Therefore, if the lubrication area where grease is easily consumed due to the driver's operation habit is different from the setting at the time of shipment, the lubrication area wears due to lack of lubrication oil, or conversely, excessive lubrication And there is a problem that it leaks out from the greasing part and impairs the environment and appearance.

The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention has been made in such a manner that an operator can arbitrarily set the timing of lubrication to each greasing portion of a construction machine so that each greasing can be performed. An object of the present invention is to provide an automatic lubrication device for a construction machine in which an appropriate amount of lubrication can be supplied to a part.

[0010]

In order to solve the above-mentioned problems, a pump means for discharging lubricating oil and a lubricating oil supply for supplying lubricating oil discharged from the pump means to each greasing portion of a construction machine are provided. Means, a supply switching means provided in the lubricating oil supply means, for supplying the lubricating oil discharged from the pump means to the lubrication site by switching, and a timing set for the supply switching means in accordance with a working state And a lubrication control unit for performing lubrication from the lubricating oil supply unit to each grease supply unit via the supply switching unit.

With the above-described configuration, for example,
Set the lubrication timing for each lubrication location, and supply lubrication at short intervals to lubrication locations that require a lot of lubricating oil, and long time intervals to lubrication locations that do not require a lot of lubrication oil. The greasing can be performed at each of the greasing parts, and the optimum greasing amount can be supplied to each greasing part by individually adjusting the greasing amount at the greasing part.

According to the second aspect of the present invention, a construction machine is provided with a lower traveling body, an upper revolving body provided on the lower traveling body to be pivotable by a revolving device, and an arm, a boom provided on the upper revolving body. And a working device provided with a bucket, and the greasing portion is divided into the turning device side and the working device side to supply grease.

[0013] With the above structure, the lubrication timing of the working device, which requires a larger amount of lubricating oil than that of the turning device, is set with a short time interval, and the timing for the turning device is set with a long time interval. In this case, it is possible to prevent running out of the lubricating oil on the working device side and to prevent the lubricating oil from leaking due to excessive lubricating oil on the turning device side.

According to the third aspect of the present invention, the first greasing control means sets the timing of greasing the turning device, and the first greasing control means sets the timing of greasing the working device. A second timing setting means for setting at a time interval shorter than the timing set by the control means, a pump driving means for driving the pump means at each timing set by the first and second timing setting means, A switching control means for switching the supply switching means at each timing set by the second timing setting means.

With the above configuration, the switching control means can switch and control the supply switching means provided in the lubricating oil supply means according to the timing set by the first timing setting means and the second timing setting means. Lubrication to the turning device side can be performed at a long time interval set by the first timing setting means, and lubrication to the working device side can be performed at a short time interval set by the second timing setting means. This makes it possible to increase the number of times of lubrication for the working device that requires a large amount of lubricating oil, and to reduce the number of times of lubrication for the turning device that does not require a large amount of lubricating oil.

According to a fourth aspect of the present invention, a construction machine is provided with a lower traveling structure, an upper revolving structure provided on the lower traveling structure so as to be pivotable by a revolving device, and a boom and an arm provided on the upper revolving structure. And a working device provided with a bucket, wherein the greasing portion is divided into the turning device side, the boom and arm side of the working device, and the bucket side of the working device to supply grease.

According to the above configuration, the time interval between the lubrication of the boom and the arm side of the working device which requires a larger amount of lubricating oil than that of the turning device side is set shorter, and the lubricating oil is further compared with the boom and arm side. If the time interval of lubrication to the bucket side that requires a large amount of lubrication is set to a medium value, while the time interval of lubrication to the swing device side that does not require a large amount of lubrication oil is set long, Can be prevented from running out of the lubricating oil, and the lubricating oil on the turning device side can be prevented from being excessively greased and causing the lubricating oil to leak.

According to the fifth aspect of the present invention, the first lubrication control means sets first lubrication timing to the turning device, and the first lubrication timing to the boom and the arm side is the first timing. Second timing setting means for setting at a time interval shorter than the timing set by the setting means, and timing for supplying oil to the bucket side at a time interval shorter than the timing set by the second timing setting means; Third timing setting means for performing the operation, pump driving means for driving the pump means at each timing set by the first, second, and third timing setting means; and the first, second, and third timings. Switching control means for switching the supply switching means at each timing set by the setting means.

With the above arrangement, the supply switching means can be switched by the switching control means in accordance with the timings respectively set by the first timing setting means, the second timing setting means, and the third timing setting means. ,
Grease is supplied to the turning device side at a long time interval set by the first timing setting means, and grease is supplied to the boom and the arm side at a medium time interval set by the second timing setting means. It is possible to perform greasing on the bucket side at short time intervals set by the timing setting means (3). As a result, a large amount of lubricating oil to be supplied to each greasing portion is supplied to the bucket side with fast consumption, the medium amount is supplied to the boom and the arm side with medium consumption, and the consumption is slow. A small amount can be supplied to the turning device side.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS.

First, FIGS. 1 to 6 show a first embodiment according to the present invention.
1 denotes a hydraulic excavator as a construction machine, the hydraulic excavator 1 includes a lower traveling body 2 and an upper revolving body that is rotatably provided on the lower traveling body 2 via a revolving device 3. And 4. The upper slewing body 4 includes an operator cab 5 provided on the front side thereof and the operator cab 5
And a machine unit 6 that houses a grease pump 11, a grease gun 19, and the like, which will be described later, and a working device 7 that is located on the side of the operator cab 5 and that is provided at the front of the upper revolving unit 4.
And a counterweight 8 provided at the rear of the upper swing body 4. The turning device 3
Is a turning wheel 3A including an outer wheel and an inner wheel for rotatably supporting the upper turning body 4, a turning motor driven by hydraulic oil, and a rotation of the output of the turning motor 3A.
, Etc. (neither is shown).

Here, the working device 7 includes the upper revolving unit 4
A boom 7A is connected to the front of the boom 7A so as to be able to move upward, an arm 7B is connected to a tip of the boom 7A so as to be able to move upward, and is rotatably pin-connected to a tip of the arm 7B. And a boom 7C.
A, arm 7B, and bucket 7C are driven by boom cylinder 7D, arm cylinder 7E, and bucket cylinder 7F, respectively.

9A, 9B, 9C, 9D, 9E, 9F, 9
G, 9H, 9J, 9K, 9L, 9M, 9N denote grease supply units for supplying grease as lubricating oil.

Here, the greasing portion 9A is a greasing portion formed by the turning wheel 3A, and the greasing portions 9B and 9C are greasing portions formed by the base end bearing device of the boom 7A. ,
Reference numeral 9E denotes a greasing portion composed of a tube-side bearing device of the boom cylinder 7D. The greasing parts 9F and 9G are greasing parts composed of a rod-side bearing device of the boom cylinder 7D, and the greasing part 9H is a greasing part composed of a tube-side bearing device of the arm cylinder 7E. Is the boom 7A
The greasing portion 9K is a greasing portion formed of a tube-side bearing device of the bucket cylinder 7F. Further, the greasing portion 9L is a greasing portion including a rod-side bearing device of the arm cylinder 7E, and the greasing portion 9M is a greasing portion including a bearing device between the arm 7B and the bucket 7C. 9N is arm 7
This is a greasing portion formed of a bearing device between B and the bucket 7C.

Further, the greasing unit 9A greasing the turning wheel 3A side, and the greasing units 9B to 9E greasing the boom 7A side of the working device 7. Furthermore, the greasing part 9F ~
9J supplies oil to the arm 7B side,
9N is for supplying grease to the bucket 7C side.

Reference numeral 10 denotes each of the lubrication units 9A to 9 of the excavator 1.
5 shows an automatic greasing device provided for greasing grease to N. The automatic greasing device 10 includes a grease pump 11, a grease supply mechanism 12, a first switching valve 18, and a second
, A switching valve 20, a controller 21 and the like.

Reference numeral 11 denotes a grease pump as a pump means. The grease pump 11 is driven by electric power supplied from the outside, and is driven and stopped according to a control signal from the controller 21. When the grease pump 11 is driven, the grease is discharged toward a later-described first switching valve 18 while sucking grease in a grease tank (not shown).

Reference numeral 12 denotes a grease supply mechanism as lubricating oil supply means for supplying grease discharged from the grease pump 11 to each of the greasing units 9A to 9N. The grease supply mechanism 12 includes a main distribution valve 13, a distribution pipe 15A to 15C, child distribution valves 16A to 16C, and the like.

Reference numeral 13 denotes a parent distribution valve connected to the discharge side of the grease pump 11 via a main pipe 14. The parent distribution valve 13 has three sub-distributors via distribution pipes 15A, 15B and 15C. It is connected to distribution valves 16A, 16B, 16C. The parent distribution valve 13 is connected to the grease pump 1.
The grease discharged from 1 is distributed to distribution pipes 15A, 15B,
Three child distribution valves 16A, 16B, 16C via 15C
Are supplied sequentially.

16A, 16B, 16C are upper revolving units 4,
Attached to boom 7A and arm 7B, distribution pipe 15
Three child distribution valves connected to the parent distribution valve 13 via A, 15B, and 15C, and 17A to 17N indicate distribution pipes connected to the greasing units 9A to 9N, respectively. Here, the child distribution valve 16A is connected to the greasing units 9B, 9C, 9 located near the boom 7A via distribution pipes 17B, 17C, 17D, 17E.
D, 9E, and the child distribution valve 16B is connected to the distribution pipe 17
Arm 7 through F, 17G, 17H, 17J, 17K
Lubrication units 9F, 9G, 9H, 9J, 9K located near B
The distribution valve 16C is connected to distribution pipes 17L and 17L.
M and 17N are connected to greasing units 9L, 9M and 9N located near bucket 7C. Also, distribution pipe 1
7A connects the output side port of the second switching valve 20 to the greasing unit 9A on the turning wheel 3A side.

The child distribution valves 16A, 16B, 16C
Are supplied via the distribution pipes 17B to 17N.
To supply grease sequentially. Thereby, the child distribution valve 16A supplies oil to the boom 7A, and the child distribution valve 1
6B supplies oil to the arm 7B, and the child distribution valve 16C supplies oil to the bucket 7C.

Reference numeral 18 denotes a first switching valve. The first switching valve 18 is connected in the middle of a main pipe 14 connecting the grease pump 11 and the parent distribution valve 13, and is connected to the first switching valve 1.
Reference numeral 8 denotes an electromagnetic pilot type switching valve having three ports and three positions. By switching the first switching valve 18 from the neutral position (a) to the switching position (b), the grease discharged from the grease pump 11 is supplied toward the second switching valve 20, and the one switching position ( By switching to c), the grease gun 19 connected to the output port
Supply grease to In addition, the driver switches to the switching position (c).
, Manual lubrication by the grease gun 19 can be performed. The first switching valve 18
Are switched by operating a main switch 22 described later.

Reference numeral 20 denotes a second switching valve as supply switching means. The second switching valve 20 is connected to the main piping 14 connecting the grease pump 11 and the main distribution valve 13 with the first switching valve. 18 are connected to the outflow side. The second switching valve 20 is constituted by an electromagnetic pilot type switching valve having three ports and two positions, and supplies grease toward the turning wheel 3A by switching the second switching valve 20 to the switching position (a). Then, by switching to the switching position (b),
Grease discharged from the grease pump 11 is supplied to the parent distribution valve 13. Thus, the second switching valve 2
Numeral 0 supplies grease separately to the turning wheel 3A side and the working device 7 side.

Numeral 21 denotes a controller as a greasing control means constituted by a microcomputer or the like. As shown in FIG. 3, the controller 21 has a main switch 22, timing setting switches 23, 24 on its input side.
Is connected. On the other hand, on the output side, the first switching valve 1
8 and the second switching valve 20 are connected. The controller 21 has a timer T1 for setting the timing TA and a timer T2 for setting the timing TB.
Is built-in.

The storage device 2 of the controller 21
1A stores the programs and the like shown in FIGS. 4 and 5, and also stores the timings TA and TB and the delay time TA0 set by the setting switches 23 and 24.

The main switch 22 is constituted by a changeover switch for selecting, for example, automatic lubrication, manual lubrication, and prohibition of lubrication.
The switching position of the switching valve 18 is set.

The setting switches 23 and 24 are constituted by, for example, dial type variable resistors.
The setting switch 23 sets the time interval for lubricating the turning wheel 3A as the lubrication timing TA. The setting switch 24 is for setting the time interval for lubricating the working device 7 as the lubrication timing TB.

The automatic greasing device 10 according to the present embodiment has the above-described configuration. Next, for the automatic greasing control process by the controller 21, refer to the control processes of FIGS. 4 and 5 and the time chart of FIG. It will be explained while doing. FIG.
FIG. 5 shows the setting process of the timings TA and TB, and FIG. 5 shows the automatic lubrication process. This process is executed when the switching valve 18 is switched to the switching position (b) by the main switch 22.

First, the timing setting process of FIG. 4 will be described. In step 1, a timing TA for lubricating the turning wheel 3A is set by the setting switch 23, and the setting switch 23 is set by turning the dial, and is set to, for example, 30 minutes.

In the next step 2, the timing TB of the working device 7 is set by the setting switch 24.
Set to 0 minutes.

In Step 3, the timings TA and TB read in Steps 1 and 2 are stored in the storage device 21A of the controller 21, and in Step 4, the timer built in the controller 21 is used according to the set timings TA and TB. Delay time TA0 between T1 and timer T2 (for example, 3 minutes)
Is set and stored in the storage device 21A.

When lubricating the turning wheel 3A and the working device 7, the grease discharged from the grease pump 11 is alternately switched by the second switching valve 20 to supply grease. , TB must not be set to the ON state. Therefore, it is necessary to set in advance a delay time TA0 for starting the timer T1 on the long timing TA side later than the timer T2 on the short timing TB side.

For example, in this embodiment, the timing TA is set to 30 minutes, the timing TB is set to 10 minutes, and the pumping time T0 during which the grease pump 11 is driven is set to 2 minutes. Therefore, the delay time TA0 is set to 3 minutes. Have been.

Next, the automatic lubrication process shown in FIG. 5 will be described with reference to the time chart of FIG.

In step 11, a timer T2 built in the controller 21 is started, and in step 12,
In order to start the timer T1, the timer T2 determines whether or not the delay time TA0 has elapsed. If "NO" is determined in the step 12, the process returns to the step 11, and "Y
If it is determined to be "ES", the process proceeds to step S13. In step 13, the delay time TA0 after the timer T2 starts
After the time has elapsed, the timer T1 is started.

In step 14, it is determined whether or not the timer T1 has passed the timing TA.
ES ", the timer T1 determines the timing T
A, so grease pump 1
Pump 1 In step 16, by switching the second switching valve 20 to the switching position (a), the grease discharged from the grease pump 11 is supplied to the distribution pipe 17A.
The oil is supplied to the greasing unit 9A on the turning wheel 3A side via. Further, in step 17, the timer T1 is reset and started, the process returns to step 14, and the processes after step 14 are repeated.

On the other hand, if "NO" is determined in the step 14, the process proceeds to a step 18, where it is determined whether or not the timer T2 has passed the timing TB.
If "YES" is determined in the step 18, the timer T2 has reached the timing TB, so that the step 19
Pumps the grease pump 11. Step 20
By switching the second switching valve 20 to the switching position (b), grease discharged from the grease pump 11 is supplied to the working device 7 via the parent distribution valve 13 and the child distribution valves 16A, 16B, 16C. The oil is supplied to the greasing units 9B to 9N. Further, in step 21, the timer T2 is reset and started, and the process returns to step 14 to repeat the processing from step 14.

On the other hand, if "NO" is determined in step 18, both of the timers T1 and T2 are set at the timing T.
Since A and TB have not been reached, return to step 14
The processing after step 14 is repeated.

In this embodiment, however, the timing TA on the turning wheel 3A is set at a long time interval and the timing TB on the working device 7 is set at a short time interval, as shown in FIG. It is possible to increase the amount of grease supplied to the side 7 and to reduce the amount of grease supplied to the turning wheel 3A.

Thus, in the automatic greasing device 10 according to the present embodiment, the rotating wheel 3
The grease is supplied to the turning wheel 3A and the working device 7 at different timings TA and TB without simultaneously supplying the grease to all the greasing portions 9A to 9N provided in the working device 7 and A. Can be changed.

Therefore, in the present embodiment, the timing is set by the turning device 3 and the working device 7 at different portions where the grease is consumed, so that the timing TB ( Every 10 minutes), lubrication can be performed to increase the amount of grease lubrication. on the other hand,
The timing T is applied to the turning wheel 3A side where the grease is less consumed.
Lubrication is performed every A (30 minutes), and the amount of grease lubrication can be reduced.

Thus, the automatic lubrication device 10 can supply an appropriate amount of grease to the greasing units 9A to 9N, and wear at the greasing portion due to insufficient grease, and conversely, due to excessive greasing. It is possible to prevent leakage of grease generated in the grease portion, and it is possible to extend the life of the turning device 3 and the working device 7 of the excavator 1.

In the automatic lubricating apparatus 10, the setting switches 23 and 24 operate the grease timings TA and TB.
Can be set arbitrarily by the operator, so that grease can be used effectively, and the amount of use of the grease can be reduced, thereby reducing running costs. Further, even when the grease is easily consumed due to the driver's operation habit, the operator can arbitrarily set the timings TA and TB, so that a more optimal lubrication amount can be set. It is.

Furthermore, by reducing the amount of grease used, the amount of grease discharged from the greasing units 9A to 9N can be reduced, and the effect on the environment can be effectively reduced.

Step 1 in FIG. 4 is a specific example of the first timing setting means, step 2 is a specific example of the second timing setting means, and steps 15 and 19 in FIG. Reference numeral 20 denotes a specific example of the switching control means.

Next, referring to FIG. 7 to FIG.
In the description of the embodiment, the feature of the present embodiment is that the portion to be greased by the timing is divided into the swivel wheel side, the boom and arm side of the working device, and the bucket side of the working device to be greased. It is in. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 31 denotes an automatic lubrication device according to the present embodiment. The automatic lubrication device 31 includes a grease pump 11, a grease supply mechanism 32 described later, a first switching valve 18, a second switching valve 33, and a controller 34. And so on. The automatic greasing device 31 is provided with a greasing unit 9A of the hydraulic shovel 1.
Grease is automatically supplied to Ｎ9N.

Reference numeral 32 denotes a grease supply mechanism as lubricating oil supply means for supplying grease discharged from the grease pump 11 to the greasing units 9A to 9N. The grease supply mechanism 32 includes a main distribution valve 13, a sub distribution valve. 16A, 16B, 16
C and the like.

Here, the input side of the child distribution valve 16A is connected to the output side of the parent distribution valve 13 via a distribution pipe 15A, and the output side is connected to distribution pipes 17B, 17C, 17D, and 17D.
A greasing unit 9B located near the boom 7A via the 17E,
9C, 9D, and 9E. On the other hand, child distribution valve 1
6C has its input side connected to the output side of the parent distribution valve 13 via a distribution pipe 15B, and has its output side provided with distribution pipes 17F and 17F.
It is connected to greasing parts 9F, 9G, 9H, 9J, 9K located near the arm 7B via 17G, 17H, 17J, 17K.

By supplying grease to the child distribution valves 16A and 16B via the parent distribution valve 13, lubrication can be performed to the grease supply units 9B to 9K on the boom 7A and arm 7B side.

The secondary distribution valve 16C has its input side connected to the output port of the second switching valve 33 via a distribution pipe 15C, and has its output side provided with distribution pipes 17L, 17M, and 17C.
Greasing unit 9 located near bucket 7C via 17N
L, 9M, 9N.

The grease discharged from the grease pump 11 is supplied to the child distribution valve 16C by switching the second switching valve 33 to the switching position (C), whereby the greasing units 9L to 9N on the bucket 7C side are provided. Can be lubricated.

The distribution pipe 17A is connected to the second switching valve 33.
Is connected to the lubrication unit 9A on the turning wheel 3A side.

Reference numeral 33 denotes a second switching valve as a supply switching means. The second switching valve 33 is located in the middle of the main pipe 14 connecting the grease pump 11 and the main distribution valve 13 and has a first switching valve. The switching valve 18 is connected to the subsequent stage. Also,
The second switching valve 33 is constituted by a four-port three-position electromagnetic pilot-type switching valve. By setting the second switching valve 33 to the switching position (A), grease is supplied to the turning wheel 3A, The grease discharged from the grease pump 11 is set to the switching position (b) so that the grease discharged from the grease
3 (the boom 7A and the arm 7B), and the grease discharged from the grease pump 11 by setting to the switching position (C) is supplied to the child distribution valve 16C (bucket 7C).
Supply to Thus, the second switching valve 33
Supplies grease to the turning wheel 3A side, the boom 7A and arm 7B side, and the bucket 7C side.

Reference numeral 34 denotes a controller as a greasing control means constituted by a microcomputer or the like. As shown in FIG. 8, the controller 34 has a main switch 22 and timing setting switches 35, 36 and 37 on the input side. It is connected. On the other hand, a grease pump 11 is connected to the output side via an electromagnetic pump (not shown) for supplying hydraulic oil, and the first switching valve 18 is connected via a pilot pump (not shown) for generating pilot pressure. And the second switching valve 3
3 are connected. In addition, the controller 34 includes:
A timer T1 for setting the timing TA, a timer T2 for setting the timing TC, and a timer T3 for setting the timing TD are provided.

The storage device 3 of the controller 34
4A stores the programs and the like shown in FIGS. 9 and 10, and also stores the timings TA, TC, TD and the delay times TA0, TC0 set by the setting switches 35, 36, 37, respectively. .

Further, the setting switches 35, 36, 3
Reference numeral 7 is constituted by, for example, a dial-type variable resistor. The setting switch 35 sets an interval TA for lubricating the turning wheel 3A as a lubrication timing. The setting switch 36 is connected to the boom 7
A, The interval TC for lubricating the arm 7B side is set as the lubrication timing. Further, the setting switch 37 sets an interval TD for lubricating the bucket 7C side.
Is set as the lubrication timing.

The automatic greasing device 31 according to the present embodiment has the above-described configuration. Next, the automatic greasing control process by the controller 34 will be described with reference to the programs of FIGS. 9 and 10 and the time chart of FIG. I will explain it. FIG. 9 shows a process for setting the timings TA, TC and TD, and FIG. 10 shows an automatic lubrication process. This process is executed when the switching valve 18 is switched to the switching position (b) by the main switch 22.

First, the timing setting process of FIG. 9 will be described. In step 31, the timing TA at which the turning wheel 3A is greased by the setting switch 35 is set to, for example, 30.
Set to minutes. In step 32, the timing T at which the setting switch 36 supplies grease to the boom 7A and the arm 7B.
C is set to, for example, 20 minutes. In step 33, the timing TD for lubricating the bucket 7C by the setting switch 37 is set to, for example, 10 minutes.

In step 34, steps 31, 32,
The timings TA, TC and TD read at 33 are stored in the storage device 34A of the controller 34, and at step 35, the timers T1, T2 and T3 built in the controller 34 are set according to the set timings TA, TC and TD. The delay time TA0 (for example, 6 minutes) and the delay time TC0 (for example, 3 minutes) are set and stored in the storage device 34A.

The delay times TA0, TC0 are set by the timings TA, TC, TD, the pumping time T0 (for example, 2 minutes) during which the grease pump 11 is driven, and the timings TA, TC, TD are simultaneously turned on. It is forbidden to be in a state.

Next, the automatic lubrication process shown in FIG.
1 will be described with reference to a time chart. Step 4
In step 1, the timer T3 built in the controller 34 is started. In step 42, in order to start the timer T1, the timer T3 determines whether or not the delay time TA0 has elapsed. If it is determined, the process proceeds to step 43, where the timer T2
, The timer T3 determines whether the delay time TC0 has elapsed.

If "NO" is determined in the step 43, the process returns to the step 41, and the processes after the step 43 are repeated. If "YES" is determined in the step 43,
In step 44, since the delay time TC0 has elapsed since the start of the timer T3, the timer T2 is started, and the processing in and after step 43 is repeated.

On the other hand, if "YES" is determined in the step 42, the process proceeds to a step 45. In the step 45, since the delay time TA0 has elapsed since the start of the timer T3, the timer T1 is started.

In step 46, it is determined whether or not the timer T1 has passed the timing TA.
ES ", the timer T1 determines the timing T
A, so grease pump 1
Pump 1 In step 48, the grease discharged from the grease pump 11 is changed to the distribution pipe 17A by switching the second switching valve 33 to the switching position (a).
The oil is supplied to the greasing unit 9A on the turning wheel 3A side via. Further, in step 49, the timer T1 is reset and started, and the process returns to step 46 to repeat the processing after this step.

On the other hand, if "NO" is determined in the step 46, the process shifts to a step 50, in which it is determined whether or not the timer T2 has passed the timing TC.
If "YES" is determined in the step 50, the timer T2 has reached the timing TC, so that the step 51
In step 52, the grease pump 11 is pumped, and in step 52, the grease discharged from the grease pump 11 is changed by switching the second switching valve 20 to the switching position (b), so that the parent distribution valve 13, the child distribution valves 16A, 16B Via the boom 7A and the arm 7B of the working device 7
Supply to J. Further, at step 53, the timer T2
Is reset and started, the process returns to step 46, and the processes after step 46 are repeated.

If "NO" is determined in the step 50, the process shifts to a step 54, in which it is determined whether or not the timer T3 has passed the timing TD.
If "YES" is determined in the step 54, the timer T3 has reached the timing TD, so that the step 56
In step 57, the grease pump 11 is pumped, and in step 57, the second switching valve 20 is switched to the switching position (C), so that the grease discharged from the grease pump 11 is supplied to the working device 7 via the child distribution valve 16C. Bucket 7C
To the greasing units 9L to 9N on the side. Step 5
In step 7, the timer T3 is reset and started, the process returns to step 46, and the processes in and after step 46 are repeated.

On the other hand, if "NO" is determined in the step 54, since none of the timers T1, T2 and T3 has reached the timings TA, TC and TD, step 4 is executed.
6, the process from step 46 onward is repeated.

In this embodiment, however, the timing TA of the turning wheel 3A is set to a long time interval, the timing TC of the boom 7A and the arm 7B of the working device 7 is set to a short time interval, and the timing TD of the bucket 7C is further set. By setting the time interval to be short, as shown in FIG. 11, the grease supply amount on the bucket 7C side of the working device 7 is increased, the supply amount on the boom 7A and the arm 7B side is set to a medium level, and the turning wheel 3A The amount of grease lubrication on the side can be reduced.

Thus, in the automatic greasing device 31 according to the present embodiment, the greasing portion is set closer to the swivel wheel 3A, the boom 7A and the arm 7B than the automatic greasing device 10 described in the first embodiment.
By dividing into three parts, namely, the side and the bucket 7C side, the amount of greasing in each part can be changed, and the adjustment of the greasing amount can be performed more finely.

Therefore, the automatic greasing device 31 according to the present embodiment
Then, since the timing is set for different portions of grease consumption, the greasing is performed at the timing 7 (10 minutes) on the bucket 7C side that requires a large amount of grease to increase the grease lubrication amount. Can be. Further, grease is supplied to the turning wheel 3A, which does not require much grease, at each timing TA (30 minutes), so that the amount of grease supply can be reduced. On the other hand, the timing TC (20) is applied to the boom 7A and the arm 7B, which require a medium amount of grease.
The grease is greased every minute), and the grease lubrication amount can be set to a medium level.

As a result, the automatic greasing device 31 can supply a proper amount of grease to the greasing units 9A to 9N, and wear of the greasing portion due to insufficient grease, and conversely, greasing by excessive greasing. It is possible to prevent leakage of grease generated at the site, and to extend the life of the turning device 3 and the working device 7 of the excavator 1.

Further, in the automatic greasing device 31, the timings TA, TC and TD for greasing the grease can be arbitrarily set by the operator using the setting switches 35, 36 and 37, and the greasing is performed. Grease can be used effectively, and the amount of use of the grease can be reduced, thereby reducing running costs. Furthermore, even if the grease is easily consumed due to the operation habits of the driver and the lubrication site is different, the operator can arbitrarily determine the timing TA, TC, TD.
Can be set, it is possible to set a more optimal amount of lubrication.

Furthermore, by reducing the amount of grease used, the amount of grease discharged from the greasing units 9A to 9N can be reduced, and the effect on the environment can be effectively reduced.

Note that step 31 in FIG. 9 is a specific example of the first timing setting means, step 32 is a specific example of the second timing setting means, step 33 is a specific example of the third timing setting means, and step 47 in FIG. , 51 and 55 are specific examples of the pump driving means, and steps 48, 52 and 56 are specific examples of the switching control means.

In each of the above embodiments, only one greasing portion 9A is provided to the turning wheel 3A, and the greasing portion 9A is connected to the distribution pipe 1A.
7A is connected to the output port of the second switching valve 20 (33). However, the present invention is not limited to this. It may be provided in the middle of the distribution pipe 17A.

In each of the above embodiments, the respective timings are set by the timer. However, the present invention is not limited to this. For example, the setting of the longer timing may be changed to one after the lubrication is performed twice by the shorter timing. You may set so that lubrication may be performed several times.

Furthermore, in each of the above embodiments, a hydraulic excavator is illustrated as a construction machine, but the present invention is not limited to this.
The present invention may be applied to other construction machines such as a hydraulic crane, a wheel loader, and a bull tozer.

[0089]

As described above in detail, according to the first aspect of the present invention, the lubricating oil discharged from the pump means is supplied to the lubricating oil supply means for supplying the lubricating oil to the respective lubricating parts. A supply switching means for switching and supplying the lubricating oil is provided, and the switching of the supply switching means is performed by a greasing control means. The lubrication can be performed at a timing with a long time interval in a lubrication site that does not require much lubricating oil. This allows
The amount of greasing supplied to each greasing portion can be optimized, and the life of the greasing portion of the construction machine can be extended. Moreover, seizure due to insufficient lubricating oil and lubricating oil leakage due to excessive lubrication of lubricating oil can be reliably prevented.

According to the second aspect of the present invention, since the greasing portion is divided into the turning device side and the working device side to supply the lubricant, the lubricating portion is supplied to the working device side that requires more lubricating oil than the turning device. By setting the lubrication timing to a short time interval and setting the lubrication timing to the turning device side to a long time interval, it is possible to change the lubrication amount between the turning device side and the working device side. Accordingly, it is possible to prevent a shortage of lubricating oil from the greasing portion on the working device side, and prevent leakage of lubricating oil due to excessive lubrication on the turning device side.

According to the third aspect of the present invention, the greasing control means includes a first timing setting means for setting the timing on the turning device side, a second timing setting means for setting the timing on the working device side, Since it is composed of pump driving means for driving the pump means at each timing set by the timing setting means and switching control means for switching the supply switching means at each timing, it is possible to supply the working equipment which needs a large amount of lubricating oil to the working equipment. The number of times of lubrication can be increased, and the number of times of lubrication can be reduced on the side of the rotating device that does not require much lubrication oil. Thereby, lubricating oil shortage at the greasing portion on the working device side can be prevented, and leakage of lubricating oil due to excessive lubrication on the turning device side can be prevented.

According to the fourth aspect of the present invention, since the greasing portion is divided into the turning device side, the boom and arm sides of the working device, and the bucket side, the lubricating portion requires more lubricating oil than the turning device. The time interval between the boom and the arm side is shortened, and the time interval between the boom and the arm side that requires more lubricating oil is further shortened.
By setting a long time interval to the turning device,
The number of greasing times can be changed on the turning device side, the boom and arm side of the working device, and the bucket side to change the greasing amount. Thereby, lubrication oil shortage at the bucket side, the boom and arm side lubrication sites can be prevented, and lubrication oil leakage due to excessive lubrication at the turning device side can be prevented.

According to the fifth aspect of the present invention, the greasing control means includes a first timing setting means for setting timing on the turning device side and a second timing setting means for setting timing on the boom and arm sides of the working device. Third timing setting means for setting the timing on the bucket side of the working device; pump driving means for driving the pump means at each timing set by the timing setting means; and supply switching means for each timing. Since it is composed of the switching control means, the number of times of lubrication can be increased for the bucket side which requires a large amount of lubricating oil, and the number of times of lubrication can be reduced for the turning apparatus side which does not require the lubricating oil. Lubricant can be lubricated moderately to the side. This prevents shortage of lubricating oil on the sliding part on the bucket side, boom and arm side of the working device, and excess lubricating oil on the turning device side,
A state in which lubricating oil leaks can be prevented.

[Brief description of the drawings]

FIG. 1 is an external view showing a hydraulic excavator applied to a first embodiment.

FIG. 2 is a configuration diagram illustrating a greasing unit provided in the hydraulic excavator according to the first embodiment.

FIG. 3 is a block diagram showing the entire configuration of the automatic greasing device according to the first embodiment.

FIG. 4 is a flowchart showing a timing setting process when performing automatic lubrication.

FIG. 5 is a flowchart showing an automatic lubrication process according to the first embodiment.

FIG. 6 shows a grease pump, a swivel wheel, and a grease pump according to the first embodiment.
It is a characteristic diagram which shows the greasing operation characteristic of a working device.

FIG. 7 is a configuration diagram illustrating a greasing unit provided in a hydraulic shovel according to a second embodiment.

FIG. 8 is a block diagram showing an entire configuration of an automatic greasing device according to a second embodiment.

FIG. 9 is a flowchart showing a timing setting process when performing automatic lubrication.

FIG. 10 is a flowchart showing an automatic lubrication process according to the second embodiment.

FIG. 11 is a characteristic diagram showing a greasing operation characteristic of a grease pump, a turning wheel, a boom and an arm, and a bucket according to a second embodiment.

[Explanation of symbols]

Reference Signs List 1 hydraulic excavator (construction machine) 3 turning device 3A turning wheel 7 working device 7A boom 7B arm 7C bucket 7D boom cylinder 7E arm cylinder 7F bucket cylinder 9A, 9B, 9C, 9D, 9E, 9F, 9G, 9H, 9
J, 9K, 9L, 9M, 9N Greasing part (greasing part) 10, 31 Automatic greasing device 11 Grease pump (pump means) 12, 32 Grease supply mechanism (lubricating oil supply means) 20, 33 Second switching Valve (supply switching means) 21, 34 Controller (greasing control means)

Claims (5)

[Claims] 1. A pump means for discharging lubricating oil, a lubricating oil supply means for supplying lubricating oil discharged from the pump means to each greasing portion of a construction machine, Supply switching means for supplying the lubricating oil discharged from the pump means by switching to the lubricating portion, and switching control of the supply switching means at a timing set according to the working state, and via the supply switching means An automatic lubrication device for a construction machine, comprising: a lubrication control unit for performing lubrication from the lubricating oil supply unit to each of the greasing parts. 2. The construction machine includes a lower traveling structure, an upper revolving structure provided on the lower traveling structure so as to be pivotable by a revolving device, an arm, a boom,
The automatic greasing device of a construction machine according to claim 1, further comprising a working device provided with a bucket, wherein the greasing portion is configured to greasing the rotating device side and the working device side separately. 3. The greasing control means includes first timing setting means for setting a timing for greasing the turning device, and timing for greasing the working device with the first timing setting means. Second timing setting means for setting at a time interval shorter than the set timing, pump driving means for driving the pump means at each timing set by the first and second timing setting means, 3. An automatic lubrication system for a construction machine according to claim 2, further comprising switching control means for switching said supply switching means at each timing set by said second timing setting means. 4. The construction machine includes a lower traveling structure, an upper revolving structure provided on the lower traveling structure to be pivotable by a revolving device, a boom, an arm,
A working device equipped with a bucket, wherein the greasing portion is the turning device side, a boom and an arm side of the working device,
The automatic greasing device for a construction machine according to claim 1, wherein the greasing is performed separately on a bucket side of the working device. 5. The greasing control means includes a first timing setting means for setting a timing for greasing the turning device, and a first timing setting means for setting a timing for greasing the boom and the arm. Timing setting means for setting at a time interval shorter than the timing set by the second timing setting means, and the timing for supplying the bucket side with the lubricant at a time interval shorter than the timing set by the second timing setting means. Third timing setting means, pump driving means for driving the pump means at each timing set by the first, second, and third timing setting means; and first, second, and third timings 5. The building according to claim 4, further comprising switching control means for switching said supply switching means at each timing set by said setting means. Automatic greasing equipment for construction machinery.